Responses immediately rolled in, particularly one translation — "Harry Returns! Won't say any details now! A week off! No comment" — that some felt was an announcement of a new book about the beloved wizarding world.

But it turns out the riddle was actually meant to preview a new spinoff film trilogy centering on Newt Scamander, the fictional author of the fictional "Fantastic Beasts and Where to Find Them," one of Potter's textbooks in the original series.

Rowling wrote seven Harry Potter books, the last in 2007, and the film adaptations comprise one of the largest grossing series of all time. More recently, Rowling has written under the pseudonym Robert Galbraith and donated to charities focusing on medical research and single mothers.
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